Concrete-mixer.



A. D. HADSEL.

CONCRETE MIXER.

APPLICATION TILED NOV. 19, 1910.

Patented Feb. 6, 1912.

3 SHEETS-SHEET 1.

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CONCRETE MIXER.

APPLICATION FILED NOV. 19, 1910.

1,016,920. v Patented Feb. 6, 1912.

3 SHEETS-SHEET 2.

WITNESSES A. D. HADSEL.

CONCRETE MIXER.

APPLICATION FILED NOV. 19, 1910. 1,01 6,920. Patented Feb. 6, 1912.

3 SHBETSSHEET 3.

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Z6 25 By 25 4 ALVAH D. HADSEL, OF DORRANCETON, PENNSYLVANIA.

CONCRETE-MIXER.

Specification of Letters Patent.

Patented Feb. 6, 1912.

Application filed November 19, 1910. Serial No. 593,219.

To all whom it may concern:

Be it known that I, ALVAH D. HADSEL, a citizen of the United States, residing at Dorranceton, in the county of Luzerne and State of Pennsylvania, have invented a new and useful Concrete-Mixer, of which the following is a specification.

This invention relates to machines for mixing batches of plastic materials, such as concrete, and comprises certain specific novel features of construction as are hereinafter fully described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the invention; Fig. 2 is a transverse central vertical section of the same; Fig. 3 is a view of the delivery end of the drum and associated devices; Fig. at is a fragmentary plan View of the discharge mechanism, and Fig. 5 is a detail perspective view of one of the mixing flights.

Throughout the following description and on the several figures of the drawings similar parts are referred to by like reference characters.

Referring particularly to the drawings, which are tobe understood as covering a preferred embodiment of the invention without restricting the invention unnecessarily to the form thereof illustrated, the numeral 10 indicates generally a mixing drum, which is preferably cylindrical and adapted to be rotated continuously in one direction around a fixed axis. The drum is provided with a gear member consisting of a hub 11, spokes 12, and a rim 13. The rim is provided with. gear teeth 13 and a pair of flanges 13" which extend therefrom in opposite directions toward the ends of the drum. The curved portion of the cylindrical drum consists essentially of two shells or sections 10 and 10 the adjacent ends or portions of p which shells are secured to the aforesaid flanges 13 and the opposite ends of the shells are coextensive with the ends of the drum. The ends proper of the drum structure consist of flat circular plates each having a central opening. The receiving end plate 14 has an opening so large as to consist of a comparatively narrow flange or rim over and within which all of the materials to be mixed are delivered. The delivery end plate is'indicated at 15 and is provided with a central opening of less diameter than that pertaining to the receiving end. A partition 16 is located parallel to the said end plates and at any suitable place between them, preferably substantially 'mid-way between the receiving end 14 and the central support ing gear member. The partition also has a central circular opening.

A circular series of elevating buckets 17 are secured around the periphery of the re ceiving end of the drum between the plate 14 and the partition 16. Said buckets may be of any suitable construction and are shown as inclining slightly at their inner ends toward the direction in which the drum is rotated, whereby the materials delivered into the receiving end of the drum will be carried up well above the axis of rotation to be transferred through the opening in the partition 16 into the mixing section of the drum, between the partition and the delivery end 15.

A series of mixing flights 18 are secured within the mixing section of the drum and extend preferably in a spiral and zig-zag relation from the partition to the delivery end thereof. I preferably employ as many of such flights as there are spokes 12. Each flight extends across and is secured to the forward face 'of its spoke, whereby it is strengthened in its use and transfers the material longitudinally of the drum without interference or obstruction by the spoke. The flights being spirally arranged the forward faces of the spokes are likewise arranged on an incline or are beveled to correspond with the position of the flights.

Each flight comprises a main section 18* extending from the partition 16 to and across its spoke in a continuous spiral direction to a point substantially midway betweenfthe gear member and the end 15, at which point it is bent at substantially a right angle forming a section 18 which extends from the angle spirally in a direction opposite to the direction of the main section 18 and is secured at its outer end to the end plate 15. By this construction a sort of pocket is formed in each flight between its ends with the effect of providing means for positively moving the material toward the middle portion of the drum in both directions and furthermore to provide means to facilitate the delivery of the mixed material from the drum.

In order to-increase the'mixing function of the flights I preferably, construct each of them with a section 18 which is formed from the body of the material constituting the main section 18 aforesaid, the section 18 lying between the section 18 and the hub 11 and being bent at an angle from the main section 18 and extending thence rearwardly to the next succeeding spoke where it is attached and leaving a-space between' the last mentioned section and the inner surface of the drum. During the operation of the mixing drum the materials to be mixed are first moved by the main sections 18 between the spokes 12, a portion of such materials continuing along the main sections 18" until the pockets at the sections 18 are reached while other portions of the material will fall inwardly toward the axis over the inner edge of the sections 18 and will be shifted toward the receiving end of the drum again by virtue of the sections 18 to be again moved forwardly by the succeeding sections 18*, this process being continued until the material is sufficiently mixed, it being understood that during the mixing operation the sections 18 will tend to keep the material away from the end plate 15 and towardthe intermediate portion of the drum;

Any suitable means may be employed tosupport and rotate the drum n on and around a fixed axis. To this en 1 have shown a main frame 19 which may be mounted upon any suitable form of truck wheels. An auxiliary frame 20 is secured to the main frame 19 and extends upwardly therefrom opposite the ends of the drum above its axis of rotation. A yoke 21 may be employed to connect the upper ends so as to brace the auxiliary frames 20. A pair of hangers 22 extend downwardly from the upper portions of the frame members 20 and support at their lower ends ,in any convenient manner a main sup orting shaft 23 which extends through t e hub 11, said shaft constituting the sole support for the drum. The axis of the shaft is fixed or stationary,but the shaft and drum may be rotated around such axis in the bearings 22 or if desired the shaft itself may be stationary and the drum rotated upon and around it.

By the construction of the receiving end of the drum already described it will be seen that the materials to be mixed are all adapted to be dumped or delivered into the receiving end of the drum near its bottom and below the axis of the drum. By this fact the labor of introducing materials into the drum is much reduced and the bearing portions of the parts are relieved from the wear and rough usage commonly incidental to the materials, especially sand and the like, when they are dumped at a higher point or above the bearings. As shown a receiving chute 24 is employed to deliver the materials into the buckets 17. The chute 24 is mounted stationarily in any suitable manner upon the main frame 19. The buckets 17 above described will elevate the material thus deposited at the bottom of} the drum, and from the buckets such materials will fall upon a transfer chute 25, from which they will glide through the partition 16 into themixing section to be acted upgn by the flights 18 as above set forth. e chute 25 is also stationary and like the ch te 24 is free from the drum. As indicated the transfer chute is rigidly connected to the frame section 20 at'the receiving end of the structure.

As a convenient means for delivering the mixed material from the drum I provide an adjustable delivering spoutor chute 26.

This is shown as being suspended substantially beneath the shaft 23 and movable circumferentially around theaxis thereof. A yoke or bail 27 connects. and braces the lateral edges of the chute, maintaining it in trough formation, and the intermediate portion of the bail is pivoted directly upon an extension 23 of said main shaft on the outside of the bearing bracket 22 adj acent thereto. The main portion therefore of the chute normally hangs suspended by gravity below the shaft, but with the inner end of the chute extending well within the mixing section of the drum the mixed material will fall thereinto from the pockets of the flights and will accordingly be discharged readily from the drum during its continuous rotation.

In order to prevent the discharge of the material before the mixing operation is completed the chute 26 is rotated around the axis of the shaft 23 through an angle of substantially 90 degrees as indicated in dotted lines in Fig. 3 where it will be ineflective to receive and discharge the material. A handle 28 is shown attached to the chutefor convenient manipulation thereof, and any suitable form of latch 29 may be employed to retain the chute in its non-discharging. .position, said latch being connected to any convenient portion of the frame, such as the auxiliary member 20. Upon releasing the latch 29 the chute will gravitate to the position indicated in full lines and whereupon the material will be discharged in the manner set forth above. The inner end of the chute 26 may be extended or deflected laterally as at 26*- in order to increase its receiving surface. 'The extension 26* in no manner interferes with the mixing operation of the device when the chute is elevated.

Any convenient form of motor may be employed to operate the machine. A pinion 30, conveniently journaled upon the frame, is in mesh with the gear teeth 13 and .is adapted to be driven by an engine suitably located at the adjacent end of the frame.-

This power device being conventional it is thought unnecess'aryto illustrate or describe the same in detail.

for the drum through said gear member, the

curved portion of the drum consisting of a pair'of shells attached respectively vto said.

flanges, a head attached to eachend of the drum, the head at the receiving end consisting of a narrow circumferential rim, a partition between said receiving end and the gear member and having a central opening for the transfer of material therethrough, a circular series of buckets within the space between said'riin and said artition to elevate the material to trans er it as stated, and a series of mixing flights extending spirally between the partition and the delivery end of the drum.

2. In a concrete mixing drum, the combination of a cylindrical shell, means to support the same for rotation about a fixed axis, said supporting means including a gear member having spokes, and a series of flights extending from one end of said shell to the other, each of the flights passing diagonally across and secured to the forward face of a spoke and each flight including an end section formed from-the same material as the main section and extending spirally in a different direction therefrom forminga pocket.

3.v In a concrete mixer, the combination of a cylindrical shell, means to rotate the shell continuouslyin a single direction around a fixed axis, means to deliver materials to be mixed into the said shell, a series of mixing flights secured within said shell, each of the flights being formed of a single blank and extending spirally from one end of the said section to the other.and comprising a main section extending spirally in a certain direction, an auxiliary section extending from the end of the main section at an angle and spirally in a different direction, form-';

ing a lifting pocket and means tending to move the material toward the middle of the drum and a third section extending rear-- wardly spirally. from the main section at an angle slightly removed from the aforesaid angle between the main and auxiliary sections, and means to discharge the mixed material from the drum.

4. In a concrete mixer, the combination of a frame, a shaft supported upon said frame and extending at one end beyond the frame, a rotatable mixing drum mounted upon said shaft, means to introduce material into one end of the drum, and means at the other end thereof to deliver the mixedmaterial therefrom, said delivering means comprising a chute suspended normally from the aforesaid shaft extension below the axis of the shaft, and means to swing the chute circumferentially around the'axis of the shaft tothrow it out of delivering position, the inner end of the chute being provided with a lateral projection to increase itsreceiving capacity, substantially as set forth.

In testimony whereof I have hereunto aflixed my signature in the presence of two witnesses.

ALVAH D. HADSEL. Witnesses:

EDMUND E. JoNEs, HILMA B. PETERSON. 

